e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd7in5b_HD/epd7in5b_HD.cpp

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2024-01-31 22:04:09 +00:00
/**
* @filename : epd7in5b.cpp
* @brief : Implements for e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare August 10 2017
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documnetation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include "epd7in5b_HD.h"
Epd::~Epd() {
};
Epd::Epd() {
reset_pin = RST_PIN;
dc_pin = DC_PIN;
cs_pin = CS_PIN;
busy_pin = BUSY_PIN;
width = EPD_WIDTH;
height = EPD_HEIGHT;
};
int Epd::Init(void) {
if (IfInit() != 0) {
return -1;
}
Reset();
SendCommand(0x12); //SWRESET
WaitUntilIdle(); //waiting for the electronic paper IC to release the idle signal
SendCommand(0x46); // Auto Write RAM
SendData(0xF7);
WaitUntilIdle(); //waiting for the electronic paper IC to release the idle signal
SendCommand(0x47); // Auto Write RAM
SendData(0xF7);
WaitUntilIdle(); //waiting for the electronic paper IC to release the idle signal
SendCommand(0x0C); // Soft start setting
SendData(0xAE);
SendData(0xC7);
SendData(0xC3);
SendData(0xC0);
SendData(0x40);
SendCommand(0x01); // Set MUX as 527
SendData(0xAF);
SendData(0x02);
SendData(0x01);
SendCommand(0x11); // Data entry mode
SendData(0x01);
SendCommand(0x44);
SendData(0x00); // RAM x address start at 0
SendData(0x00);
SendData(0x6F); // RAM x address end at 36Fh -> 879
SendData(0x03);
SendCommand(0x45);
SendData(0xAF); // RAM y address start at 20Fh;
SendData(0x02);
SendData(0x00); // RAM y address end at 00h;
SendData(0x00);
SendCommand(0x3C); // VBD
SendData(0x01); // LUT1, for white
SendCommand(0x18);
SendData(0X80);
SendCommand(0x22);
SendData(0XB1); //Load Temperature and waveform setting.
SendCommand(0x20);
WaitUntilIdle(); //waiting for the electronic paper IC to release the idle signal
SendCommand(0x4E);
SendData(0x00);
SendData(0x00);
SendCommand(0x4F);
SendData(0xAF);
SendData(0x02);
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
SpiTransfer(command);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes HIGH
*/
void Epd::WaitUntilIdle(void) {
unsigned char busy;
while(DigitalRead(busy_pin)){
// DelayMs(10);
}
DelayMs(200);
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
DigitalWrite(reset_pin, LOW); //module reset
DelayMs(2);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
void Epd::Displaypart(const unsigned char* pbuffer, unsigned long xStart, unsigned long yStart,\
unsigned long Picture_Width, unsigned long Picture_Height, unsigned char Block) {
SendCommand(0x4F);
SendData(0xAf);
SendData(0x02);
if(Block == 0){
SendCommand(0x24);
}else if(Block == 1){
SendCommand(0x26);
}
for (unsigned long j = 0; j < height; j++) {
for (unsigned long i = 0; i < width/8; i++) {
if( (j>=yStart) && (j<yStart+Picture_Height) && (i*8>=xStart) && (i*8<xStart+Picture_Width)){
if(Block == 0){
SendData((pgm_read_byte(&(pbuffer[i-xStart/8 + (Picture_Width)/8*(j-yStart)]))) );
}else{
SendData(~(pgm_read_byte(&(pbuffer[i-xStart/8 + (Picture_Width)/8*(j-yStart)]))) );
}
}else {
if(Block == 0){
SendData(0xff);
}else {
SendData(0x00);
}
}
}
}
if(Block == 1){
SendCommand(0x22);
SendData(0xC7);
SendCommand(0x20);
DelayMs(100);
WaitUntilIdle();
}
}
/**
* @brief: After this command is transmitted, the chip would enter the
* deep-sleep mode to save power.
* The deep sleep mode would return to standby by hardware reset.
* The only one parameter is a check code, the command would be
* executed if check code = 0xA5.
* You can use EPD_Reset() to awaken
*/
void Epd::Sleep(void) {
SendCommand(0x10); //deep sleep
SendData(0x01);
}
/* END OF FILE */